Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP1)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP1)
Announcement ID: SUSE-SU-2019:1889-1
Rating: important
References: #1137597 #1140747
Cross-References:CVE-2019-11477 CVE-2019-11478
Affected Products:
  • SUSE Linux Enterprise Module for Live Patching 15-SP1

An update that fixes two vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.12.14-195 fixes several issues.
The following security issues were fixed:

  • CVE-2019-11477: Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service. (bsc#1137586)
  • CVE-2019-11478: Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. (bsc#1137586)

This update contains a regression fix for CVE-2019-11477 and CVE-2019-11478 (bsc#1140747).

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Module for Live Patching 15-SP1:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2019-1889=1

Package List:

  • SUSE Linux Enterprise Module for Live Patching 15-SP1 (ppc64le x86_64):
    • kernel-livepatch-4_12_14-195-default-4-10.1

References: